1688057523 has 12 divisors (see below), whose sum is σ = 2501142280. Its totient is φ = 1125229356.

The previous prime is 1688057479. The next prime is 1688057533. The reversal of 1688057523 is 3257508861.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 1688057523 - 2¹³ = 1688049331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688057533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209536 + ... + 217442.

Almost surely, 2^1688057523 is an apocalyptic number.

1688057523 is a deficient number, since it is larger than the sum of its proper divisors (813084757).

1688057523 is an frugal number, since it uses more digits than its factorization.

1688057523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15823 (or 7910 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 1688057523 is about 41085.9772063413. The cubic root of 1688057523 is about 1190.6818875169.

The spelling of 1688057523 in words is "one billion, six hundred eighty-eight million, fifty-seven thousand, five hundred twenty-three".